CN204254614U - Gas-air premix sprays the backflow preheat staged combustion device that vault jet guides - Google Patents
Gas-air premix sprays the backflow preheat staged combustion device that vault jet guides Download PDFInfo
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- CN204254614U CN204254614U CN201420722796.7U CN201420722796U CN204254614U CN 204254614 U CN204254614 U CN 204254614U CN 201420722796 U CN201420722796 U CN 201420722796U CN 204254614 U CN204254614 U CN 204254614U
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Abstract
The utility model relates to backflow preheat staged combustion device gas-air premix spraying the guiding of vault jet, be combustion chamber in the body of wall of combustion chamber, air intake duct on the body of wall of combustion chamber and gas inlet pipe are connected to air in the body of wall of combustion chamber and gas allocation passage, the coal gas spray orifice of distribution of gas and air interchannel gas-air premix grid communicates with gas allocation passage, air jet orifices communicates with air distribution channel, the outlet of gas-air premix grid is placed in the premixed flow be contained in the body of wall of combustion chamber inside gas allocation passage and distributes circuit, opening with combustion chamber is arranged at the top that premixed flow distributes circuit, top of combustion chamber has the air nozzle pipe being communicated with combustion chamber, the utility model improves the stability of combustion intensity and burning, fuel saving, investment reduction, reduce the discharge capacity of EGT and pernicious gas, reduce the good result of environmental pollution.
Description
Technical field
The utility model relates to the burner of blast funnace hot blast stove, and especially blast furnace provides the backflow preheat staged combustion device a kind of gas-air premix of the hot-blast stove of high-temperature blast spraying the guiding of vault jet.
Background technology
Current, blast funnace hot blast stove is considered to require under lower heat of combustion blast furnace gas, obtain high-performance and high wind-warm syndrome from energy-saving and cost-reducing, and finally reach efficiently, energy-saving and environmental protection, volume increase object.For this reason, the combustion process that must realize optimizing in hot-blast stove combines with the diabatic process of strengthening boiler flow field.This just relates to the structure of burner, heat storage body structure and layout, and the tissue of air velocity distribution, especially the Structure and Properties of burner is particularly crucial on the impact of hot-blast stove, make a general survey of the burner of the various blast funnace hot blast stoves used at present, great majority all mix with air with coal gas in combustion space, preheating, ignition pattern is main, it is uneven always to there is mixing in this pattern, incomplete combustion, the bags is large, burner structure selects the problems such as improper, cause the changing features of combustion-gas flow in combustion chamber large, air-flow is unstable, combustion intensity is low, and then cause air flow method in regenerator uneven, reduce the utilization rate of heat-transfer effect and heat storage, because the structure of heat storage is all difficult to choose according to flow field structure and load condition with layout, thus the performance of entire effect hot-blast stove and practical effect.Therefore, along with people are to the theory of burning, heat and mass, fluid flowing and the raising of application technology understanding thereof and the going deep into of application practice, and iron-smelting process attention with environmental protection efficient, energy-conservation for the demand and metallurgy industry of stablizing high wind-warm syndrome, it is imperative to improve the burner in hot-blast stove field.
Summary of the invention
For above-mentioned situation, for overcoming the deficiency on the burning of existing burner and heat transfer structure, and further consider the burner meeting energy-saving and emission-reduction requirement, the utility model provides the backflow preheat staged combustion device a kind of gas-air premix spraying the guiding of vault jet, can effectively solve coal gas low with air mixing rate, mix uneven, combustion intensity is low, incomplete combustion and the large problem of the bags.
The technical solution adopted in the utility model is, comprise combustion chamber body of wall, combustion chamber, air intake duct, gas inlet pipe, air distribution channel, gas allocation passage, gas-air premix grid, air jet orifices, coal gas spray orifice, premixed flow distributes circuit and air nozzle pipe, combustion chamber body of wall is made up of together with the tubular wall connecting of lower vertical top vault, the inner space of combustion chamber body of wall is combustion chamber, on the tubular body of wall of combustion chamber body of wall, its axis vertical has been staggeredly arranged air intake duct and gas inlet pipe from top to bottom, air intake duct and gas inlet pipe are vertically connected the air distribution channel and gas allocation passage of building by laying bricks or stones in the body of wall of combustion chamber respectively, gas-air premix grid is provided with between the bottom of gas allocation passage and the top of air distribution channel, the bottom that the coal gas spray orifice of gas-air premix grid is placed in gas allocation passage communicates with gas allocation passage, the top that the air jet orifices of gas-air premix grid is placed in air distribution channel communicates with air distribution channel, the outlet of gas-air premix grid is placed in and (refers to the side near combustion chamber inside gas allocation passage) inside gas allocation passage the premixed flow be contained in the body of wall of combustion chamber distributes circuit, opening with combustion chamber is arranged at the top that premixed flow distributes circuit, top of combustion chamber has the air nozzle pipe of the backflow guiding being communicated with combustion chamber vertically downward.
The utility model is the mend gene done on existing hot-blast stove gas burner architecture basics, with the upwards annular airflow that the coal gas of grating type and the quick premix mode of air produce, the combination of the air-flow of jetting downwards with top of combustion chamber centre, with the burner design of the flow field structure of overheavy firing room backflow vortex, what effectively realize Combustion of Hot Air Furnace device mixes the vortex preheated burning that to reflux with high strength fast and uniformly, effectively improves the stability of combustion intensity and burning.Hot-blast stove adopts this burner can ensure efficient, the high-heat strength of hot-blast stove under safety and stablization prerequisite and the operation of high wind pushing temperature, then reach the discharge capacity of fuel saving, investment reduction, reduction EGT and pernicious gas, reduce the good result of environmental pollution.
Accompanying drawing explanation
Fig. 1 is sectional front view of the present utility model.
Fig. 2 is A-A sectional view in the utility model Fig. 1.
Fig. 3 is the B direction view of the utility model Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is elaborated.
As Fig. 1, shown in Fig. 2 and Fig. 3, the utility model comprises combustion chamber body of wall 1, combustion chamber 2, air intake duct 3, gas inlet pipe 4, air distribution channel 5, gas allocation passage 6, gas-air premix grid 7, air jet orifices 7a, coal gas spray orifice 7b, premixed flow distributes circuit 8 and air nozzle pipe 9, it is characterized in that, combustion chamber body of wall 1 is made up of together with the tubular wall connecting of lower vertical top vault, the inner space of combustion chamber body of wall is combustion chamber 2, on the tubular body of wall of combustion chamber body of wall 1, its axis vertical has been staggeredly arranged air intake duct 3 and gas inlet pipe 4 from top to bottom, air intake duct 3 and gas inlet pipe 4 are vertically connected the air distribution channel 5 and gas allocation passage 6 of building by laying bricks or stones in the body of wall of combustion chamber respectively, gas-air premix grid 7 is provided with between the bottom of gas allocation passage 6 and the top of air distribution channel 5, the bottom that the coal gas spray orifice 7b of gas-air premix grid is placed in gas allocation passage 6 communicates with gas allocation passage, the top that the air jet orifices 7a of gas-air premix grid is placed in air distribution channel 5 communicates with air distribution channel, the outlet of gas-air premix grid 7 is placed in and (refers to the side near combustion chamber inside gas allocation passage) inside gas allocation passage the premixed flow be contained in the body of wall of combustion chamber distributes circuit 8, the opening be connected with combustion chamber 2 is arranged at the top that premixed flow distributes circuit 8, the air nozzle pipe 9 of the backflow guiding being communicated with combustion chamber 2 is vertically downward arranged at top, combustion chamber 2.
Described combustion chamber body of wall 1 be metal shell inwall is built by laying bricks or stones high temperature resistant 1300 DEG C ~ 1500 DEG C refractory masses form, the skin that the internal layer that resistant to elevated temperatures refractory masses is made up of the strong andalusite high-alumina brick of thermal shock resistance or dichroite-mullite brick, lightweight refracrory are formed, and the ceramic fiber cotton of outer outside and sprayed coating combine formation from the inside to the outside successively.
Described air intake duct 3 and gas inlet pipe 4 are the circular channels of building high-alumina brick or clay brick formation on inner wall of metal tube by laying bricks or stones.
Described air distribution channel 5 and gas allocation passage 6 are that to build by andalusite high-alumina brick the longitudinal section formed by laying bricks or stones be the circular passage of rectangle.
The structure of described gas-air premix grid 7 is, brick body is upper and lower, left and right is staggered forms multiple-layer horizontal spray orifice, top is two-layer is coal gas spray orifice 7b, the lower two layers of coal gas spray orifice is air jet orifices 7a, the outlet of coal gas spray orifice 7b and air jet orifices 7a and premixed flow distribute the outside body of wall vertical connection of circuit 8, and gas-air premix grid 7 is circularized by andalusite high-alumina brick or dichroite-mullite brick masonry.
The cross section that described premixed flow distributes circuit 8 is rectangle, and the opening on top is perpendicular to combustion chamber, and the centerline direction that the wall of opening inner side distributes circuit to premixed flow tilts.
Described air nozzle pipe 9 is arranged on the center at top, combustion chamber 2, is that the andalusite brick being high alumina by material builds the contraction-like jet pipe in the bottom formed by laying bricks or stones.
During enforcement, coal gas is by entering gas-air premix grid 7 bottom gas allocation passage 6, and enter premixed flow distribution circuit 8 from its staggered coal gas spray orifice 7b, air enters gas-air premix grid 7 by the top of air distribution channel 5, and enter premixed flow distribution circuit 8 from its staggered air jet orifices 7a, here coal gas and air are evenly fully and effectively mix rapidly, then enter combustion chamber 2 vertically upward by the upper opening of premixed flow distribution circuit 8 under the restriction of combustion chamber spherical vault, form backflow vortex flow, under the guiding of air nozzle pipe 9 jet-stream wind at top, combustion chamber 2, make backflow vortex flow be strengthened afterwards, and combustion chamber is left fast under it guides.Thisly in combustion chamber, be formed with the airflow pattern structure being beneficial to reflux fast premix and preheating, catching fire and burn, effectively can improve the combustion process of the steady flame of backflow of burner, and be conducive to realizing classification premix, preheating, catching fire and the fuel gas low NOx (NO burnt
x) fired state, air nozzle pipe 9 can spray air or oxygen-enriched air (oxygen content is about 30%), can form the combustion mode (burning for low-heat value gas) that mixed combustion process is then strengthened in oxygen debt burning in advance (reduction ignition temperature) again; Also can spray the mixture of coal gas or coal gas and air, excess air burner in advance can be formed and the combustion mode (burning for high heating value gas) of the strengthening mixed combustion process in later stage.
Hot-blast stove to adopt on gas-air grid premix of the present utility model spray and after the staged combustion device of strong inverse flow preheating under the guiding of top jet-stream wind, by between coal gas with air mix while the combustion system taking a large amount of combustion space that burns to change in the little space of grid high-strength, fast, the jet of porous mouth sprays premixed, and the backflow vortex flow field that the air-flow formation vault that the guiding utilizing premixed flow to distribute circuit 8 opening vertically upward makes to enter combustion chamber is turned back, and under the jet-impingement effect of the air nozzle pipe 9 of combustion chamber vault setting, form the preheated burning of strong eddy flow from the backflow vortex of the very strong high strength premixed flow of preheat function, it is poor that this just efficiently solves low-heat value gas premixing effect, pre-calorific intensity is low, combustion instability, low some key issues waiting blast furnace hot blast stove combustion process of ignition temperature.Therefore, adopt the thermal property of the hot-blast stove of this burner, can make hot-blast stove under the condition of lower heat of combustion coal gas, under the condition of the equal not preheating of coal gas and air, possessed efficient, high wind-warm syndrome, function with energy-conserving and environment-protective, but also achieve and reduce NO
xthe grading combustion technology of discharge, has accomplished the requirement more meeting environmental protection while overheavy firing process, has had economic and social benefit significantly.
Claims (7)
1. gas-air premix sprays the backflow preheat staged combustion device that vault jet guides, comprise combustion chamber body of wall (1), combustion chamber (2), air intake duct (3), gas inlet pipe (4), air distribution channel (5), gas allocation passage (6), gas-air premix grid (7), air jet orifices (7a), coal gas spray orifice (7b), premixed flow distributes circuit (8) and air nozzle pipe (9), it is characterized in that, combustion chamber body of wall (1) is made up of together with the tubular wall connecting of lower vertical top vault, the inner space of combustion chamber body of wall is combustion chamber (2), on the tubular body of wall of combustion chamber body of wall (1), its axis vertical has been staggeredly arranged air intake duct (3) and gas inlet pipe (4) from top to bottom, air intake duct (3) and gas inlet pipe (4) are vertically connected the air distribution channel (5) and gas allocation passage (6) of building by laying bricks or stones in the body of wall of combustion chamber respectively, gas-air premix grid (7) is provided with between the bottom of gas allocation passage (6) and the top of air distribution channel (5), the bottom that the coal gas spray orifice (7b) of gas-air premix grid is placed in gas allocation passage (6) communicates with gas allocation passage, the top that the air jet orifices (7a) of gas-air premix grid is placed in air distribution channel (5) communicates with air distribution channel, the outlet of gas-air premix grid (7) is placed in the premixed flow be contained in the body of wall of combustion chamber inside gas allocation passage and distributes circuit (8), the opening be connected with combustion chamber (2) is arranged at the top that premixed flow distributes circuit (8), the air nozzle pipe (9) of the backflow guiding being communicated with combustion chamber (2) is vertically downward arranged at combustion chamber (2) top.
2. gas-air premix according to claim 1 sprays the backflow preheat staged combustion device that vault jet guides, it is characterized in that, the refractory masses formation of described combustion chamber body of wall (1) for metal shell inwall being built high temperature resistant 1300 DEG C ~ 1500 DEG C by laying bricks or stones, the skin that the internal layer that resistant to elevated temperatures refractory masses is made up of the strong andalusite high-alumina brick of thermal shock resistance or dichroite-mullite brick, lightweight refracrory are formed, and the ceramic fiber cotton of outer outside and sprayed coating combine formation from the inside to the outside successively.
3. gas-air premix according to claim 1 sprays the backflow preheat staged combustion device that vault jet guides, it is characterized in that, described air intake duct (3) and gas inlet pipe (4) are the circular channels of building high-alumina brick or clay brick formation on inner wall of metal tube by laying bricks or stones.
4. gas-air premix according to claim 1 sprays the backflow preheat staged combustion device that vault jet guides, it is characterized in that, described air distribution channel (5) and gas allocation passage (6) are that to build by andalusite high-alumina brick the longitudinal section formed by laying bricks or stones be the circular passage of rectangle.
5. gas-air premix according to claim 1 sprays the backflow preheat staged combustion device that vault jet guides, it is characterized in that, the structure of described gas-air premix grid (7) is, brick body is upper and lower, left and right is staggered forms multiple-layer horizontal spray orifice, top is two-layer is coal gas spray orifice (7b), the lower two layers of coal gas spray orifice is air jet orifices (7a), the outlet of coal gas spray orifice (7b) and air jet orifices (7a) and premixed flow distribute the outside body of wall vertical connection of circuit (8), gas-air premix grid (7) is circularized by andalusite high-alumina brick or dichroite-mullite brick masonry.
6. gas-air premix according to claim 1 sprays the backflow preheat staged combustion device that vault jet guides, it is characterized in that, the cross section that described premixed flow distributes circuit (8) is rectangle, the opening on top is perpendicular to combustion chamber, and the centerline direction that the wall of opening inner side distributes circuit to premixed flow tilts.
7. gas-air premix according to claim 1 sprays the backflow preheat staged combustion device that vault jet guides, it is characterized in that, described air nozzle pipe (9) is arranged on the center at combustion chamber (2) top, is that the andalusite brick being high alumina by material builds the contraction-like jet pipe in the bottom formed by laying bricks or stones.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420722796.7U CN204254614U (en) | 2014-11-27 | 2014-11-27 | Gas-air premix sprays the backflow preheat staged combustion device that vault jet guides |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420722796.7U CN204254614U (en) | 2014-11-27 | 2014-11-27 | Gas-air premix sprays the backflow preheat staged combustion device that vault jet guides |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105444171A (en) * | 2015-12-11 | 2016-03-30 | 陈维汉 | Top-combustion-adjustable cyclone type high-speed combusting device |
| CN110044176A (en) * | 2019-05-23 | 2019-07-23 | 郑州釜鼎热能技术有限公司 | A kind of burner of the tunnel oven of the vertical upper spraying, combustion of premixed flow |
| CN111578282A (en) * | 2020-06-05 | 2020-08-25 | 郑州釜鼎热能技术有限公司 | High-speed rotational flow premixing combustion device with controllable performance of air-cooled combustion channel |
-
2014
- 2014-11-27 CN CN201420722796.7U patent/CN204254614U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105444171A (en) * | 2015-12-11 | 2016-03-30 | 陈维汉 | Top-combustion-adjustable cyclone type high-speed combusting device |
| CN110044176A (en) * | 2019-05-23 | 2019-07-23 | 郑州釜鼎热能技术有限公司 | A kind of burner of the tunnel oven of the vertical upper spraying, combustion of premixed flow |
| CN111578282A (en) * | 2020-06-05 | 2020-08-25 | 郑州釜鼎热能技术有限公司 | High-speed rotational flow premixing combustion device with controllable performance of air-cooled combustion channel |
| CN111578282B (en) * | 2020-06-05 | 2022-03-29 | 郑州釜鼎热能技术有限公司 | High-speed rotational flow premixing combustion device with controllable performance of air-cooled combustion channel |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210409 Address after: Metallurgy Avenue, Yangzhai Town, Guangshui City, Suizhou City, Hubei Province 432700 Patentee after: Hubei Sino New Material Technology Co.,Ltd. Address before: 450003 room 1108, Zhenghua building, 56 Huayuan Road, Jinshui District, Zhengzhou City, Henan Province Patentee before: Chen Weihan |